Page 244 - ICC IEBC 2018

RESOURCE A

FIGURE 1.5.1
FINISH RATINGS—INORGANIC MATERIALS

NUMBER OF
ASSEMBLIES

10

The number in each box is
keyed to the last number in the
Item Code column in the Table.
For example:
F.R.I.-14

5

15 16 14

7 12 5

6 11 2 13

4 3 10 1 9 8
0
0 12 24 36 48 60

FIRE RESISTANCE RATING (HOURS)

TABLE 1.5.1
FINISH RATINGS—INORGANIC MATERIALS
PERFORMANCE REFERENCE NUMBER REC. F.R.
ITEM CODE THICKNESS CONSTRUCTION DETAILS NOTES
FINISH RATING PRE-BMS-92 BMS-92 POST-BMS-92 (MIN.)
3 / ″ gypsum wallboard faced with / ″
3
F.R.-I-1 9 / ″ cement-asbestos board. 16 20 minutes 1 1, 2 15
8
16
1 / ″ gypsum sheathing faced with / ″
3
2
F.R.-I-2 11 / ″ cement-asbestos board. 16 20 minutes 1 1, 2 20
16
3 / ″ cement-asbestos board over uninsulated
16
F.R.-I-3 3 / ″ cavity. 10 minutes 1 1, 2 5
16
3 / ″ cement-asbestos board over insulated
16
F.R.-I-4 3 / ″ cavities. 5 minutes 1 1, 2 5
16
3 / ″ thick 1:2; 1:3 gypsum plaster over paper
F.R.-I-5 3 / ″ backed metal lath. 20 minutes 1 1, 2, 3 20
4
4
3 / ″ thick portland cement plaster on metal
4
F.R.-I-6 3 / ″ lath. 10 minutes 1 1, 2 10
4
3 / ″ thick 1:5; 1:7.5 lime plaster on metal
F.R.-I-7 3 / ″ lath. 10 minutes 1 1, 2 10
4
4
F.R.-I-8 1″ 1″ thick neat gypsum plaster on metal lath. 35 minutes 1 1, 2, 4 35
F.R.-I-9 3 / ″ 3 / ″ thick neat gypsum plaster on metal lath. 30 minutes 1 1, 2, 4 30
4 4
(continued)
2018 INTERNATIONAL EXISTING BUILDING CODE ® 225
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